Lions hooker Hibbard missed what was only Wales’ second win against the Springboks after his club Gloucester refused to release him because it was taking place outside the autumn’s official Test window.

Although Scott Baldwin, who wore No.2 against the Springboks, has struggled at the lineout for Wales and the Ospreys, former New Zealand hooker Gatland had considered sticking with him after the success against the Boks.

But Hibbard’s extra physicality and bone-crunching tackling just swung it his way with Wales preparing for another brutal confrontation irrespective of the line-up England coach Stuart Lancaster is able to pick because of a crippling injury crisis.

Richard Hibbard of Wales

Scarlets sensation Williams has been one of Welsh rugby’s in-form players this campaign with the Welsh management having turned up the heat on North following a series of disappointing and below-par performances at international level.

They have claimed the Northampton Saints powerhouse would have been dropped for the clash with South Africa even if he hadn’t been injured and have told him to up his work-rate, go looking for the ball and get more involved in matches.

Fellow powerhouse Alex Cuthbert had also been under some pressure to hang on to his place but Williams has to make do with a place on the substitutes’ bench, as cover for wing and full-back.

We understand the prospect of moving Halfpenny to the wing to allow Williams to play full-back was not considered.

Wales plan to bring their huge strike runners off the wings and send them down the George Ford channel occupied by the small England outside-half and also test the defensive resolve of centre Luther Burrell.

The crunch tournament opener will also see skipper Sam Warburton win his 50th cap.

The Wales XV to face England on February 6

“We decided to name the team early to give the players the best possible chance of preparation,” said Gatland.

“It was a tough call on the two changes we have made from the side that beat South Africa, but its good to have these and other tough selection decisions and it’s a strong position to be in.

“We are excited about kicking the tournament off on Friday against a strong England side in front of a packed Millennium Stadium.”